三相桥式整流电路及其MATLAB仿真..

目录

摘要....................................................................................... - 2 - Abstract .................................................................................. - 3 - 第一章引言 .......................................................................... - 4 - 1.1 设计背景....................................................................... - 4 - 1.2 设计任务....................................................................... - 4 - 第二章方案选择论证 .......................................................... - 6 - 2.1方案分析........................................................................ - 6 - 2.2方案选择........................................................................ - 6 - 第三章电路设计 ................................................................ - 7 - 3.1 主电路原理分析............................................................ - 7 - 第四章仿真分析 ................................................................ - 9 - 4.1 建立仿真模型 ............................................................... - 9 - 4.2仿真参数的设置 .......................................................... - 10 - 4.3 仿真结果及波形分析................................................... - 11 - 第五章设计总结 ................................................................ - 26 - 致谢................................................................................. - 27 - 参考文献............................................................................... - 28 -

摘要

目前，各类电力电子变换器的输入整流电路输入功率级一般采用不可控整流或相控整流电路。这类整流电路结构简单，控制技术成熟，但交流侧输入功率因数低，并向电网注入大量的谐波电流。据估计，在发达国家有60%的电能经过变换后才使用，而这个数字在本世纪初达到95%。

电力电子技术在电力系统中有着非常广泛的应用。据估计，发达国家在用户最终使用的电能中，有60%以上的电能至少经过一次以上电力电子变流装置的处理。电力系统在通向现代化的进程中，电力电子技术是关键技术之一。可以毫不夸张地说，如果离开电力电子技术，电力系统的现代化就是不可想象的。

随着社会生产和科学技术的发展，整流电路在自动控制系统、测量系统和发电机励磁系统等领域的应用日益广泛。Matlab提供的可视化仿真工具Simulink 可直接建立电路仿真模型，随意改变仿真参数，并且立即可得到任意的仿真结果，直观性强，进一步省去了编程的步骤。本文利用Simulink对三相桥式全控整流电路进行建模，对不同控制角、桥故障情况下进行了仿真分析，既进一步加深了三相桥式全控整流电路的理论，同时也为现代电力电子实验教学奠定良好的实验基础。

此次课程设计要求设计晶闸管三相桥式可控整流电路，与三相半波整流电路相比，三相桥式整流电路的电源利用率更高，应用更为广泛。

关键词：电力电子晶闸管simulink 三相桥式整流电路

Abstract

At present, all kinds of power electronic converter input rectifier circuit input power level generally use the uncontrolled rectifier or phase controlled rectifier circuit. This kind of rectifier circuit is simple in structure, control technology is mature, but the AC input power factor is low, and the harmonic currents injected a lot to the power grid. According to estimates, in developed countries 60% of the electric energy transformed before use, and this figure reached 95% at the beginning of the century.

Power electronic technology has been widely used in electric power system. According to estimates, the developed countries in the end users to use electricity, with more than 60% of the electricity at least after more than once in power electronic converter device. Power system in the modernization process, the power electronic technology is one of the key technologies. It is no exaggeration to say that, if you leave the power electronic technology, power system modernization is unthinkable.

With the development of social production and scientific technology, application of rectifier circuit in the field of automatic control system, the measuring system and the generator excitation system is more and more widely. Matlab provides a visual simulation tool Simulink can directly establish circuit simulation model, changing the simulation parameters, and can immediately get the simulation results of arbitrary, intuitive, further saves the programming steps. In this paper, Simulink is used to model the three-phase full-bridge controlled rectifier circuit, the different control angle, bridge fault conditions are simulated and analyzed, which deepens the three-phase full-bridge controlled rectifier circuit theory, it also examines the foundations for modern power electronic experimental teaching lay a good solid.

The curriculum design for the design of thyristor three-phase bridge controlled rectifier circuit, compared with three phase half wave rectifier circuit, the power of three-phase bridge rectifier circuit utilization rate higher, more extensive application.

Key words: electronic power thyristor Simulink three-phase bridge rectifier circuit